Nano-copper conductive ink preparation method

The invention belongs to the nanometer material technical field, in particular to a nano-copper conductive ink preparation method, comprising the following steps: dissolving copper salt and organic protective agents in a solvent, heating the solution to 30-100 DEG C, simultaneously adding reducing agent in the reaction system to react while stirring for 20-30min, then cooling gradually; finally obtaining stable nano-copper conductive ink through electrodialysis separation and reduced pressure distillation. The invention has simple process, mild reaction conditions and short reaction time; the conductibility of the product is good, the particle size of nano-copper is 20-70nm, the nano-copper can not be oxidized for one month in the air; the production cost is low and no hazardous waste can be generated, thus meeting the demand of 'green production'.